| Effects of irrigation mode and sowing density on photosynthetic efficiency and yield of spring wheat in Northeast China |
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| DOI：10.7606/j.issn.1000-7601.2024.06.08 |
| Key Words: pring wheat sowing density irrigation mode photosynthetic efficiency grain yield |
| Author Name | Affiliation | | FENG Ming | Crop Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, Liaoning 110161, China | | WANG Yingjie | Crop Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, Liaoning 110161, China | | WANG Shu | College of Agriculture, Shenyang Agricultural University, Shenyang, Liaoning 110866, China | | ZHUANG Yan | Crop Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, Liaoning 110161, China | | GE Weide | Crop Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, Liaoning 110161, China |
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| Abstract: |
| The purpose of this study was to examine the effects of optimal seeding density and irrigation methods on wheat photosynthesis and yield, and to explore the potential for increasing the yield and profitability of the Liaoning wheat variety, ‘Liaochun 33’. The split\|plot design with two factors was adopted. The irrigation modes were the main area, including two sprinkler irrigation modes （P1: one sprinkler irrigation belt served 10 rows of wheat; P2: one sprinkler irrigation belt served 12 rows of wheat） and two drip irrigation modes （D1: one drip irrigation belt served 6 rows of wheat; D2： one drip irrigation belt served 8 rows of wheat）. The sowing density levels were 225（M1）, 262（M2）, 300（M3）, and 337 kg·hm-2（M4）. The results showed that the photosynthetic characteristics, SPAD value, leaf area index and yield of spring wheat under drip irrigation were higher than those in sprinkler irrigation. The yield of irrigation treatment D2 was 2.15%, 4.57% and 6.16% higher than D1, P1 and P2 at the same seeding density. Under the same irrigation mode, the photosynthetic characteristics, SPAD value, leaf area index and yield of M3 density treatment were better than M1, M2 and M4 treatment, with the increase ranging from 2.44% to 10.75%. The grain yield of spring wheat treated with D2M3 reached 7 025.48 kg·hm-2, which increased by 1.24%~15.90% compared with other treatments. In conclusion, one drip irrigation belt serving 8 rows of wheat with the seeding density of 300 kg·hm-2 can be recommended for the spring wheat planting mode in Liaoning Province. |
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